Difference between revisions of "CH Weekly Reports"
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** M3 bolts threaded through first part of the holder. | ** M3 bolts threaded through first part of the holder. | ||
** M3 nuts pressed into the second part of the holder. | ** M3 nuts pressed into the second part of the holder. | ||
| − | ** Parts printed out of PETG plastic with low density infill. | + | ** Parts printed out of PETG plastic with low density infill (10%). |
* Edited rebinning code for energy calibrations for data sets collected with ADC to account for changes in calibration code. | * Edited rebinning code for energy calibrations for data sets collected with ADC to account for changes in calibration code. | ||
Revision as of 23:01, 29 September 2022
09/19/22
- Investigated non-linearity of peak sensing ADC due to issues arising in energy calibrations and efficiency measurements.
- Modified existing calibration code to use non-linear regression to account for ADC.
- Sourced material needed for CaGaS Phase II setup.
- Calculated ADC dead time for live-time correction to efficiency measurement count rates and calculated dead time per experiment.
- Designed holder for Gd foils needed for CaGaS Phase II experiment. To be 3D printed and tested for tolerances.
09/26/22
- Printed both parts of the Gd foil holder for CaGaS Phase II.
- Parts fit together adequately considering they're 3D printed and not machined.
- M3 bolts threaded through first part of the holder.
- M3 nuts pressed into the second part of the holder.
- Parts printed out of PETG plastic with low density infill (10%).
- Edited rebinning code for energy calibrations for data sets collected with ADC to account for changes in calibration code.
- Energy calibration script now uses 2nd order polynomial regression to account for nonlinearity of ADC
- The coefficients from the regression are passed to another script to rebin ADC data from channel to energy, preserving bin count, but bin width will increase as a function of energy.
- End goal is to pass coefficients into rebinning function and draw energy calibrated plot in the same script.
- Designed Gd2O3 powder holder for CaGaS Phase II.
- Have spray on clear coat to seal plastic after printing is complete in hopes that powder will not stick between printed layers when used.
- Documented Gd holders in wiki with rendered images and a description of intended use.
- Continued to research live time correction for HPGe count rates and think I have applied the correction correctly at the initial measurement level, which will be propagated through to efficiency calculations.
- Researched and tested different integration methods for more accurate measurement of counts in energy peak to compare to Gaussian fit.